Roller-mill for crushing and grinding.



No. 684,|48.' Patented Oct. 8, IQ UI.

J. C. WEGEBIF. ROLLER MILL FUR CBUSHING AND GRINDING;

(Application filed Apr. 26, 1901.)

(No Model.) 2 Shaeta-8heet I.

- JZZZ amqyf No. 684,148. Patented Oct. 8, |9OI.

J. c. WEGERIF. ROLLER MILL FOR CBUSHING AND GRINDING.

(Application filed Apr. 26, 1901.)

2 Shuts-Sheet 2.

(No Model.)

77??7265665/ I @ndl m T n: uunnzs mas cc PNUYO-UTNQ, WASHINGTON, u. c,

UNITED STATES PATENT OFFICE.

JOHANNES OHRISTIAAN XVEGERIF, OF LONDON, ENGLAND.

ROLLER-MILL FOR CRUSHING AND GRINDING.

.sPECIFICATION formingpart of Letters Patent No. 684,148, dated October 8, 1901.

Application filed April 26, 1901.

To all whom it may concern:

Be it known that I, JoHANNEs CHRISTIAAN WEGERIF, engineer, a subject of the Queen of the Netherlands, residing at 4-5 Woburn Place, London, England, have invented a new and useful Improvement in Roller-Mills for Crushing and Grinding, of which the following is a specification.

My invention relates to an improved rollermill for crushing and grinding, which consists, essentially, in the combination of internal and external revolving grinding-surfaces having their axes of revolution oblique the one to the other and in different planes, so that the planes of revolution will be mutually oblique and a disruptive as well as a crushing action will be produced, the one surface being formed by the interior of a revolving ring and the other by the exterior of a revolving roller working within the ring.

Reference is to be had to the accompanying drawings, wherein is illustrated one form of my improved mill comprising a crushingring and a revolving roller, both adapted to rotate about horizontal axes which lie in vertical planes oblique to one another, the roller being mounted in a lever-frame loaded by spring-pressure.

In the drawings, Figure 1 is a plan view, and Fig. 2 a side elevation, of the mill, both views being partly in section.

It is, however, to be distinctly understood that I do not limit myself to the particular form or arrangement of parts herein illustrated.

Referring to the drawings, Cb is the pressure-roller, carried by a shaft b, journaled in bearings c in the two side members 01 of a V- shaped lever-frame fulcrumed at e e to the bed-plate f and loaded by the pressure of a spring or springs 9, applied to the point of convergence of the two side members d of the lever, the springs g being confined between the lever and an adjustable nut 71, screwing upon a rod 1, passing through the spring and anchored to the bed-plate f, the downward motion of the lever-frame being limited by a stop formed of packing-blocks j, changeable to regulate the initial setting of the roller and allow for wear of the roller and ring. The side members d of the lever- Serial No. 57,584. (No model.)

frame may be tied together by a cross-stay, such as 70.

Zis the ring, which is provided with a renewable liner or, whose interior periphery forms the grinding-surface of the ring, the liner m being seated within the ring, so as to revolve therewith as one, and being prevented from endwise displacement therein by a shoulder or or other suitable means.

The ring Z is mounted to revolve in a sta tionary bearing 0, preferably formed, as shown, by an annular casting or plumberblock carried by the bed-plate f, there being, if desired, a set of antifriction-rollers interposed, as at 19, between the revolving ring Z and the bearing 0, while the endwise thrust of the ring 1 (due to the disruptive stress caused by the obliquity of the roller and ring axes) may be resisted by a set of bearingballs, as at q, running in V-grooves formed in adjacent faces of the bearing 0 and of a flange 'r on the revolving ring Z. Instead, however,of the ringlbeing mounted to revolve within an annular bearing, as shown, it might be otherwise supported rotatably -as, for example, upon external guide-sheaves mounted in fixed bearings, the end thrust of the ring being resisted by other sheaves suitably applied.

The ring Z is shown as being driven by rope bands running upon the grooved periphery s of the end flange a" of the ring and theroller CL by a belt running upon a fiy-wheel pulley 25, keyed upon the shaft 19. The endwise thrust transmitted by the shaft 6 may be resisted by collars u on the latter taking against the ends of the'bearings c in which the shaft rotates, bearing-balls being, if desired, interposed to lessen the effect of friction. For the same purpose a thrust-bearing, such as indicated in Fig; 2, may be provided on that member (Z of the lever-frame toward which the thrust of the shaft 1) is directed, a set of antifriction-balls being interposed, as at 0,

between the end of the shaft and a thrust block y, supported by the bearing and adjusted by means of a set-screw, as at w.

It is desirable that the side members cl of the lever-frame should converge symmetrically, as shown in Fig. 2, so that the axis of the spring guide-rod i, and therefore the point of application of spring-pressure to the leverframe, may lie in the central transverse plane of the roller a. It will be evident that by this arrangement the pressure applied to the roller a. will be uniformly distributed throughout the'length of the roller and that in consequence of the lever-frame being fulcru med in fixed bearings at e e the roller will be pre vented from canting in the event of an excess of material being fed in toward either end of the line of contact or bite :0 cc between the roller a and liner m.

The axes of both the roller a and ring Z are, as already stated, shown in the example illustrated as being horizontal; but in certain cases it may be desirable to arrange the axis of the roller a or that of the ring Z, or even both these axes, at an inclination to the horizonal. Further, in order that a straight and substantially horizontal line of bite may be maintained between and continuously across the whole width of the grinding-surfaces of the roller and ring the periphery of the roller a is shown as being slightly concave and that of the liner m slightly convex, each in a direction parallel to its own axis. The grinding-surface of the ring-liner m might, however, be cylindrical, in which case the form of the roller (6 must be slightly barreled or bellied, so that the line of bite between the ring and roller may be continuous, or the roller a might be cylindrical and the surface of liner m convex, or the roller u might be barreled or bellied and the surface of liner m concave, the form of the grinding-surfaces in every case being such as to preserve a continuous line of bite between the ring and roller. Similarly the degree of obliquity between the planes in which the ring and roller axes lie is shown as being about fifteen degrees; but this might be varied, in which case also the'form of the grinding-surface of the ring or of the roller, or of both, would need to be correspondingly varied in order to maintain a continuous line of bite.

In the example illustrated the roller a is shown as bearing directly upon the lowermost part of the ring; but it might bear against the ring toward one side of the vertical axial plane of the ring, and in that case if the axis of the roller is horizontal the axis of the ring would need to be inclined, or vice versa.

In any case the mutual relative positions of the ring, the roller, and the lever-fulcrum may be so arranged as to produce a kind of l wedging action between the roller and ring, in addition to the direct pressure due to the weight of the roller and the load on the lever-frame.

The material to be ground would be fed into the ring in advance of and as close as f r practicable to the line of bite of the roller 5 and ring and after passing between the grinding-surfaces would be discharged from the ring in any convenient manner. 7

I clain1 1. A mill for crushing and grinding, eonsisting of a roller rotating within and in surface contact with a revolving ring, the axes of the roller and ring being oblique to one another and in different planes, and the act ing external surface of the roller and the internal surface of the ring being mutually of such relative configuration that a continuous line of bite between the surfaces of the roller and ring will be maintained notwithstanding their mutual axial obliquity, and a dis ruptive as well as a crushing action will be produced, as specified.

2. A mill for crushing and grinding, con-1 sisting of a roller rotating within and in sur-i face contact with a revolving ring, the axes of the roller and ring lying in different hori-fl zont-al planes and in different vertical planes will be maintained notwithstanding their mutual axial obliquity, and a disruptive as well as a crushing action will be produced, as specified.

3. A mill for crushing and grinding, con- 7 sisting of a roller journaled in a pressure-lever frame, the roller being adapted to revolve I within and in surface contact with a revol'vi ing ring, the axes of the roller and ring be-' ing oblique to each other and in different P planes,and the contactingsurfaces of the roller and ring being mutually of such relative con-.

figuration that a continuous line of bite between the contacting surfaces will be main action will be produced in consequence of the mutual obliquity of the planes of revolution of the roller and ring.

JOHAXNES CHRISTIAAN WEGERIF. itnesses T. W. KENNARD, C. G. CLARK.

{05: tained and a disruptive as well asa crushing 

